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    <p>This isn't really the best way to have interprocess communication, I recommend you either use the multiprocessing or threading libraries with something like either a Queue or PIPE for communication and synchronization.</p> <p>a Queue would be simplest way for sharing data, one process would put in a value and another would get the values.</p> <p>I've modified your original code so it works now, note that raw_input doesn't flush stdout as such if theres nothing there it will hang, <a href="http://code.activestate.com/lists/python-list/265749/" rel="nofollow">http://code.activestate.com/lists/python-list/265749/</a> which is why your code was just waiting for stdout ...</p> <p><b> THIS IS DANGEROUS, it can generate deadlocks, use at your own risk, try another method.</b> </p> <pre><code>import sys print 'Whats your favorite animal\n' #raw_input doesn't flush :( and we want to read in a whole line sys.stdout.flush() f = raw_input() print f </code></pre> <p>and the corresponding main.py</p> <pre><code>import subprocess, sys, os process = subprocess.Popen([sys.executable]+['example.py'], stdout = subprocess.PIPE, stderr = subprocess.PIPE, stdin = subprocess.PIPE) while True: if process.poll() != None: break request_input = process.stdout.readline() # read line, this will wait until there's actually a line to read. if request_input == "Whats your favorite animal\n": print 'request: %s sending: %s' % (request_input, 'cat') process.stdin.write('cat\n') process.stdin.flush() </code></pre>
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    1. POPython, trying to get input from subprocess?
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    1. USSamy Vilar
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    1. CO"request_input == "Whats your favorite animal\n":", I am just looking for the general case when the raw_input function has been accessed.
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    2. COI see thats a bit trickier since what raw_input usually does is just read from stdin calling readline on that file descriptor object, I was thinking of checking if that file has being opened but I think its opened automatically, as soon as execution starts :( sorry. multiprocessing/threading maybe the best unless you really need raw_input...
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    3. COAh i see, I am open to any solution,, What I am trying to make is a python IDE (for fun). Input in a ide is kinda important so I would need it. I guess ill just keep scouting for the answer, Again Thanks for replying
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